I know for a fact several Elementary school teachers tell their students up from that their parents will be shocked at what is being taught and just won’t understand it. They do things the ‘old way’, but *we* do math the new and improved way.
Message being your parents are old school; old fogies who just aren’t ‘with it. Disregard your parents’ ignorance and learn it our way.
Enough of them do it where it’s got to come from a central source. Whether it’s the official CC line, I don’t know.
My son’s teacher last year tried to tell me that, at a private school no less, that I probably didn’t understand math well, which is why we were struggling with the homework.
I said any adult who finished high school should be able to help a fourth grader with math. And as a degreed engineer, and my husband with a masters’ in engineering, if two people who actually use algebra, geometry and calculus for work can’t understand two digit by two digit multiplication, the problem was their teaching method, not the concept.
We taught our son how to do standard multiplication the way people have done it for decades, and he got the right answer. She then counted it wrong for using the wrong method.
I pulled out a calculator and showed her that the answer was right, and counting it wrong for the method every adult in the building learned was petty if not evil.
The parent teacher council has since dumped common core and that teacher.
This year, the public school in our area has ditched most of common core. And the poor public fifth graders who have used it for years need remedial work to learn to add, subtract, multiply and divide at third grade levels.